high STEM SerialED: achieving high-resolution data for ab initio structure determination of beam-sensitive nanocrystalline materials By journals.iucr.org Published On :: 2024-01-01 Serial electron diffraction (SerialED), which applies a snapshot data acquisition strategy for each crystal, was introduced to tackle the problem of radiation damage in the structure determination of beam-sensitive materials by three-dimensional electron diffraction (3DED). The snapshot data acquisition in SerialED can be realized using both transmission and scanning transmission electron microscopes (TEM/STEM). However, the current SerialED workflow based on STEM setups requires special external devices and software, which limits broader adoption. Here, we present a simplified experimental implementation of STEM-based SerialED on Thermo Fisher Scientific STEMs using common proprietary software interfaced through Python scripts to automate data collection. Specifically, we utilize TEM Imaging and Analysis (TIA) scripting and TEM scripting to access the STEM functionalities of the microscope, and DigitalMicrograph scripting to control the camera for snapshot data acquisition. Data analysis adapts the existing workflow using the software CrystFEL, which was developed for serial X-ray crystallography. Our workflow for STEM SerialED can be used on any Gatan or Thermo Fisher Scientific camera. We apply this workflow to collect high-resolution STEM SerialED data from two aluminosilicate zeolites, zeolite Y and ZSM-25. We demonstrate, for the first time, ab initio structure determination through direct methods using STEM SerialED data. Zeolite Y is relatively stable under the electron beam, and STEM SerialED data extend to 0.60 Å. We show that the structural model obtained using STEM SerialED data merged from 358 crystals is nearly identical to that using continuous rotation electron diffraction data from one crystal. This demonstrates that accurate structures can be obtained from STEM SerialED. Zeolite ZSM-25 is very beam-sensitive and has a complex structure. We show that STEM SerialED greatly improves the data resolution of ZSM-25, compared with serial rotation electron diffraction (SerialRED), from 1.50 to 0.90 Å. This allows, for the first time, the use of standard phasing methods, such as direct methods, for the ab initio structure determination of ZSM-25. Full Article text
high Structure determination using high-order spatial correlations in single-particle X-ray scattering By journals.iucr.org Published On :: 2024-01-01 Single-particle imaging using X-ray free-electron lasers (XFELs) is a promising technique for observing nanoscale biological samples under near-physiological conditions. However, as the sample's orientation in each diffraction pattern is unknown, advanced algorithms are required to reconstruct the 3D diffraction intensity volume and subsequently the sample's density model. While most approaches perform 3D reconstruction via determining the orientation of each diffraction pattern, a correlation-based approach utilizes the averaged spatial correlations of diffraction intensities over all patterns, making it well suited for processing experimental data with a poor signal-to-noise ratio of individual patterns. Here, a method is proposed to determine the 3D structure of a sample by analyzing the double, triple and quadruple spatial correlations in diffraction patterns. This ab initio method can reconstruct the basic shape of an irregular unsymmetric 3D sample without requiring any prior knowledge of the sample. The impact of background and noise on correlations is investigated and corrected to ensure the success of reconstruction under simulated experimental conditions. Additionally, the feasibility of using the correlation-based approach to process incomplete partial diffraction patterns is demonstrated. The proposed method is a variable addition to existing algorithms for 3D reconstruction and will further promote the development and adoption of XFEL single-particle imaging techniques. Full Article text
high Conformation–aggregation interplay in the simplest aliphatic ethers probed under high pressure By journals.iucr.org Published On :: 2024-01-01 The structures of the simplest symmetric primary ethers [(CnH2n+1)2O, n = 1–3] determined under high pressure revealed their conformational preferences and intermolecular interactions. In three new polymorphs of diethyl ether (C2H5)2O, high pressure promotes intermolecular CH⋯O contacts and enforces a conversion from the trans–trans conformer present in the α, β and γ phases to the trans–gauche conformer, which is higher in energy by 6.4 kJ mol−1, in the δ phase. Two new polymorphs of dimethyl ether (CH3)2O display analogous transformations of the CH⋯O bonds. The crystal structure of di-n-propyl ether (C3H7)2O, determined for the first time, is remarkably stable over the whole pressure range investigated from 1.70 up to 5.30 GPa. Full Article text
high Dynamic X-ray speckle-tracking imaging with high-accuracy phase retrieval based on deep learning By journals.iucr.org Published On :: 2024-01-01 Speckle-tracking X-ray imaging is an attractive candidate for dynamic X-ray imaging owing to its flexible setup and simultaneous yields of phase, transmission and scattering images. However, traditional speckle-tracking imaging methods suffer from phase distortion at locations with abrupt changes in density, which is always the case for real samples, limiting the applications of the speckle-tracking X-ray imaging method. In this paper, we report a deep-learning based method which can achieve dynamic X-ray speckle-tracking imaging with high-accuracy phase retrieval. The calibration results of a phantom show that the profile of the retrieved phase is highly consistent with the theoretical one. Experiments of polyurethane foaming demonstrated that the proposed method revealed the evolution of the complicated microstructure of the bubbles accurately. The proposed method is a promising solution for dynamic X-ray imaging with high-accuracy phase retrieval, and has extensive applications in metrology and quantitative analysis of dynamics in material science, physics, chemistry and biomedicine. Full Article text
high High-accuracy measurement, advanced theory and analysis of the evolution of satellite transitions in manganese Kα using XR-HERFD By journals.iucr.org Published On :: 2024-06-21 Here, the novel technique of extended-range high-energy-resolution fluorescence detection (XR-HERFD) has successfully observed the n = 2 satellite in manganese to a high accuracy. The significance of the satellite signature presented is many hundreds of standard errors and well beyond typical discovery levels of three to six standard errors. This satellite is a sensitive indicator for all manganese-containing materials in condensed matter. The uncertainty in the measurements has been defined, which clearly observes multiple peaks and structure indicative of complex physical quantum-mechanical processes. Theoretical calculations of energy eigenvalues, shake-off probability and Auger rates are also presented, which explain the origin of the satellite from physical n = 2 shake-off processes. The evolution in the intensity of this satellite is measured relative to the full Kα spectrum of manganese to investigate satellite structure, and therefore many-body processes, as a function of incident energy. Results demonstrate that the many-body reduction factor S02 should not be modelled with a constant value as is currently done. This work makes a significant contribution to the challenge of understanding many-body processes and interpreting HERFD or resonant inelastic X-ray scattering spectra in a quantitative manner. Full Article text
high Solvent organization in the ultrahigh-resolution crystal structure of crambin at room temperature By journals.iucr.org Published On :: 2024-08-27 Ultrahigh-resolution structures provide unprecedented details about protein dynamics, hydrogen bonding and solvent networks. The reported 0.70 Å, room-temperature crystal structure of crambin is the highest-resolution ambient-temperature structure of a protein achieved to date. Sufficient data were collected to enable unrestrained refinement of the protein and associated solvent networks using SHELXL. Dynamic solvent networks resulting from alternative side-chain conformations and shifts in water positions are revealed, demonstrating that polypeptide flexibility and formation of clathrate-type structures at hydrophobic surfaces are the key features endowing crambin crystals with extraordinary diffraction power. Full Article text
high High-throughput nanoscale crystallization of dihydropyridine active pharmaceutical ingredients By journals.iucr.org Published On :: 2023-12-21 Single-crystal X-ray diffraction analysis of small molecule active pharmaceutical ingredients is a key technique in the confirmation of molecular connectivity, including absolute stereochemistry, as well as the solid-state form. However, accessing single crystals suitable for X-ray diffraction analysis of an active pharmaceutical ingredient can be experimentally laborious, especially considering the potential for multiple solid-state forms (solvates, hydrates and polymorphs). In recent years, methods for the exploration of experimental crystallization space of small molecules have undergone a `step-change', resulting in new high-throughput techniques becoming available. Here, the application of high-throughput encapsulated nanodroplet crystallization to a series of six dihydropyridines, calcium channel blockers used in the treatment of hypertension related diseases, is described. This approach allowed 288 individual crystallization experiments to be performed in parallel on each molecule, resulting in rapid access to crystals and subsequent crystal structures for all six dihydropyridines, as well as revealing a new solvate polymorph of nifedipine (1,4-dioxane solvate) and the first known solvate of nimodipine (DMSO solvate). This work further demonstrates the power of modern high-throughput crystallization methods in the exploration of the solid-state landscape of active pharmaceutical ingredients to facilitate crystal form discovery and structural analysis by single-crystal X-ray diffraction. Full Article text
high Attractive and repulsive forces in a crystal of [Rb(18-crown-6)][SbCl6] under high pressure By journals.iucr.org Published On :: 2024-03-20 The compression behavior of [Rb(18-crown-6)][SbCl6] crystal under pressure up to 2.16 (3) GPa was investigated in a diamond anvil cell (DAC) using a mixture of pentane–isopentane (1:4) as the pressure-transmitting fluid. The compound crystallizes in trigonal space group R3 and no phase transition was observed in the indicated pressure range. The low value of pressure bulk modulus [9.1 (5) GPa] found in this crystal is a characteristic of soft materials with predominant dispersive and electrostatic interaction forces. The nonlinear relationship between unit-cell parameters under high pressure is attributed to the influence of reduced intermolecular H⋯Cl contacts under pressure over 0.73 GPa. It also explains the high compression efficiency of [Rb(18-crown-6)][SbCl6] crystals at relatively low pressures, resulting in a significant shift of the Rb atom to the center of the crown ether cavity. At pressures above 0.9 GPa, steric repulsion forces begin to play a remarkable role, since an increasing number of interatomic H⋯Cl and H⋯H contacts become shorter than the sum of their van der Waals (vdW) radii. Below 0.9 GPa, both unit-cell parameter dependences (P–a and P–c) exhibit hysteresis upon pressure release, demonstrating their influence on the disordered model of Rb atoms. The void reduction under pressure also demonstrates two linear sections with the inflection point at 0.9 GPa. Compression of the crystal is accompanied by a significant decrease in the volume of the voids, leading to the rapid approach of Rb atoms to the center of the crown ether cavity. For the Rb atom to penetrate into the center of the crown ether cavity in [Rb(18-crown-6)][SbCl6], it is necessary to apply a pressure of about 2.5 GPa to disrupt the balance of atomic forces in the crystal. This sample serves as a compression model demonstrating the influence of both attractive and repulsive forces on the change in unit-cell parameters under pressure. Full Article text
high Crystal structure solution and high-temperature thermal expansion in NaZr2(PO4)3-type materials By journals.iucr.org Published On :: 2024-03-22 The NaZr2P3O12 family of materials have shown low and tailorable thermal expansion properties. In this study, SrZr4P6O24 (SrO·4ZrO2·3P2O5), CaZr4P6O24 (CaO·4ZrO2·3P2O5), MgZr4P6O24 (MgO·4ZrO2·3P2O5), NaTi2P3O12 [½(Na2O·4TiO2·3P2O5)], NaZr2P3O12 [½(Na2O·4ZrO2·3P2O5)], and related solid solutions were synthesized using the organic–inorganic steric entrapment method. The samples were characterized by in-situ high-temperature X-ray diffraction from 25 to 1500°C at the Advanced Photon Source and National Synchrotron Light Source II. The average linear thermal expansion of SrZr4P6O24 and CaZr4P6O24 was between −1 × 10−6 per °C and 6 × 10−6 per °C from 25 to 1500°C. The crystal structures of the high-temperature polymorphs of CaZr4P6O24 and SrZr4P6O24 with R3c symmetry were solved by Fourier difference mapping and Rietveld refinement. This polymorph is present above ∼1250°C. This work measured thermal expansion coefficients to 1500°C for all samples and investigated the differences in thermal expansion mechanisms between polymorphs and between compositions. Full Article text
high Crystal structures of two new high-pressure oxynitrides with composition SnGe4N4O4, from single-crystal electron diffraction By journals.iucr.org Published On :: 2024-05-08 SnGe4N4O4 was synthesized at high pressure (16 and 20 GPa) and high temperature (1200 and 1500°C) in a large-volume press. Powder X-ray diffraction experiments using synchrotron radiation indicate that the derived samples are mixtures of known and unknown phases. However, the powder X-ray diffraction patterns are not sufficient for structural characterization. Transmission electron microscopy studies reveal crystals of several hundreds of nanometres in size with different chemical composition. Among them, crystals of a previously unknown phase with stoichiometry SnGe4N4O4 were detected and investigated using automated diffraction tomography (ADT), a three-dimensional electron diffraction method. Via ADT, the crystal structure could be determined from single nanocrystals in space group P63mc, exhibiting a nolanite-type structure. This was confirmed by density functional theory calculations and atomic resolution scanning transmission electron microscopy images. In one of the syntheses runs a rhombohedral 6R polytype of SnGe4N4O4 could be found together with the nolanite-type SnGe4N4O4. The structure of this polymorph was solved as well using ADT. Full Article text
high High-resolution crystal structure of the double nitrate hydrate [La(NO3)6]2[Ni(H2O)6]3·6H2O By journals.iucr.org Published On :: 2024-05-10 This study introduces bis[hexakis(nitrato-κ2O,O')lanthanum(III)] tris[hexaaquanickel(II)] hexahydrate, [La(NO3)6]2[Ni(H2O)6]3·6H2O, with a structure refined in the hexagonal space group Roverline{3}. The salt comprises [La(NO3)6]3− icosahedra and [Ni(H2O)6]2+ octahedra, thus forming an intricate network of interpenetrating honeycomb lattices arranged in layers. This arrangement is stabilized through strong hydrogen bonds. Two successive layers are connected via the second [Ni(H2O)6]2+ octahedra, forming sheets which are stacked perpendicular to the c axis and held in the crystal by van der Waals forces. The synthesis of [La(NO3)6]2[Ni(H2O)6]3·6H2O involves dissolving lanthanum(III) and nickel(II) oxides in nitric acid, followed by slow evaporation, yielding green hexagonal plate-like crystals. Full Article text
high Time-resolved high-energy X-ray diffraction studies of ultrathin Ni ferrite films on MgO(001) By journals.iucr.org Published On :: 2023-11-29 Time-resolved high-energy X-ray diffraction was used during growth of ultrathin NixFe3−xO4 films with varying Ni content (0 ≤ x ≤ 1.5) deposited on MgO(001) substrates by reactive molecular beam epitaxy, providing an insight into the growth dynamics of these films. In order to obtain structural information, reciprocal-space maps were recorded and the temporal evolution of the Bragg peaks specific to the octahedral and tetrahedral lattice sites of the inverse spinel structure of NixFe3−xO4 was observed during growth of the films. A time delay, corresponding to a coverage of 1.2–1.8 nm, between the appearance of the Bragg reflections originating from octahedral sites and reflections originating exclusively from tetrahedral sites indicates that the ferrite films grow in two stages. In the initial growth phase, a rock salt interface layer is formed. Afterwards, a structural transition occurs and the films grow in an inverse spinel structure. The thickness of the initial rock salt phase was found to increase with Ni content and to be responsible for atypical strain in the thin films. Films with Ni contents x > 1 do not show a structural transition. These films remain in a (deficient) rock salt structure consisting of a mixed Ni–Fe oxide and do not form a spinel structure at all. They show an increased number of NiO clusters as detected by X-ray photoelectron spectroscopy of the valence band, accompanied by a significant roughening of the films. Full Article text
high Unlocking the surface chemistry of ionic minerals: a high-throughput pipeline for modeling realistic interfaces By journals.iucr.org Published On :: 2024-03-15 A systematic procedure is introduced for modeling charge-neutral non-polar surfaces of ionic minerals containing polyatomic anions. By integrating distance- and charge-based clustering to identify chemical species within the mineral bulk, our pipeline, PolyCleaver, renders a variety of theoretically viable surface terminations. As a demonstrative example, this approach was applied to forsterite (Mg2SiO4), unveiling a rich interface landscape based on interactions with formaldehyde, a relevant multifaceted molecule, and more particularly in prebiotic chemistry. This high-throughput method, going beyond techniques traditionally applied in the modeling of minerals, offers new insights into the potential catalytic properties of diverse surfaces, enabling a broader exploration of synthetic pathways in complex mineral systems. Full Article text
high Novel high-efficiency 2D position-sensitive ZnS:Ag/6LiF scintillator detector for neutron diffraction By journals.iucr.org Published On :: 2024-05-10 Scintillator-based ZnS:Ag/6LiF neutron detectors have been under development at ISIS for more than three decades. Continuous research and development aim to improve detector capabilities, achieve better performance and meet the increasingly demanding requirements set by neutron instruments. As part of this program, a high-efficiency 2D position-sensitive scintillator detector with wavelength-shifting fibres has been developed for neutron-diffraction applications. The detector consists of a double scintillator-fibre layer to improve detection efficiency. Each layer is made up of two orthogonal fibre planes placed between two ZnS:Ag/6LiF scintillator screens. Thin reflective foils are attached to the front and back scintillators of each layer to minimize light cross-talk between layers. The detector has an active area of 192 × 192 mm with a square pixel size of 3 × 3 mm. As part of the development process of the double-layer detector, a single-layer detector was built, together with a prototype detector in which the two layers of the detector could be read out separately. Efficiency calculations and measurements of all three detectors are discussed. The novel double-layer detector has been installed and tested on the SXD diffractometer at ISIS. The detector performance is compared with the current scintillator detectors employed on SXD by studying reference crystal samples. More than a factor of 3 improvement in efficiency is achieved with the double-layer wavelength-shifting-fibre detector. Software routines for further optimizations in spatial resolution and uniformity of response have been implemented and tested for 2D detectors. The methods and results are discussed in this manuscript. Full Article text
high Synthesis and in-depth structure determination of a novel metastable high-pressure CrTe3 phase By journals.iucr.org Published On :: 2024-05-24 This study reports the synthesis and crystal structure determination of a novel CrTe3 phase using various experimental and theoretical methods. The average stoichiometry and local phase separation of this quenched high-pressure phase were characterized by ex situ synchrotron powder X-ray diffraction and total scattering. Several structural models were obtained using simulated annealing, but all suffered from an imperfect Rietveld refinement, especially at higher diffraction angles. Finally, a novel stoichiometrically correct crystal structure model was proposed on the basis of electron diffraction data and refined against powder diffraction data using the Rietveld method. Scanning electron microscopy–energy-dispersive X-ray spectrometry (EDX) measurements verified the targeted 1:3 (Cr:Te) average stoichiometry for the starting compound and for the quenched high-pressure phase within experimental errors. Scanning transmission electron microscopy (STEM)–EDX was used to examine minute variations of the Cr-to-Te ratio at the nanoscale. Precession electron diffraction (PED) experiments were applied for the nanoscale structure analysis of the quenched high-pressure phase. The proposed monoclinic model from PED experiments provided an improved fit to the X-ray patterns, especially after introducing atomic anisotropic displacement parameters and partial occupancy of Cr atoms. Atomic resolution STEM and simulations were conducted to identify variations in the Cr-atom site-occupancy factor. No significant variations were observed experimentally for several zone axes. The magnetic properties of the novel CrTe3 phase were investigated through temperature- and field-dependent magnetization measurements. In order to understand these properties, auxiliary theoretical investigations have been performed by first-principles electronic structure calculations and Monte Carlo simulations. The obtained results allow the observed magnetization behavior to be interpreted as the consequence of competition between the applied magnetic field and the Cr–Cr exchange interactions, leading to a decrease of the magnetization towards T = 0 K typical for antiferromagnetic systems, as well as a field-induced enhanced magnetization around the critical temperature due to the high magnetic susceptibility in this region. Full Article text
high Mix and measure II: joint high-energy laboratory powder diffraction and microtomography for cement hydration studies By journals.iucr.org Published On :: 2024-07-04 Portland cements (PCs) and cement blends are multiphase materials of different fineness, and quantitatively analysing their hydration pathways is very challenging. The dissolution (hydration) of the initial crystalline and amorphous phases must be determined, as well as the formation of labile (such as ettringite), reactive (such as portlandite) and amorphous (such as calcium silicate hydrate gel) components. The microstructural changes with hydration time must also be mapped out. To address this robustly and accurately, an innovative approach is being developed based on in situ measurements of pastes without any sample conditioning. Data are sequentially acquired by Mo Kα1 laboratory X-ray powder diffraction (LXRPD) and microtomography (µCT), where the same volume is scanned with time to reduce variability. Wide capillaries (2 mm in diameter) are key to avoid artefacts, e.g. self-desiccation, and to have excellent particle averaging. This methodology is tested in three cement paste samples: (i) a commercial PC 52.5 R, (ii) a blend of 80 wt% of this PC and 20 wt% quartz, to simulate an addition of supplementary cementitious materials, and (iii) a blend of 80 wt% PC and 20 wt% limestone, to simulate a limestone Portland cement. LXRPD data are acquired at 3 h and 1, 3, 7 and 28 days, and µCT data are collected at 12 h and 1, 3, 7 and 28 days. Later age data can also be easily acquired. In this methodology, the amounts of the crystalline phases are directly obtained from Rietveld analysis and the amorphous phase contents are obtained from mass-balance calculations. From the µCT study, and within the attained spatial resolution, three components (porosity, hydrated products and unhydrated cement particles) are determined. The analyses quantitatively demonstrate the filler effect of quartz and limestone in the hydration of alite and the calcium aluminate phases. Further hydration details are discussed. Full Article text
high Quality assessment of the wide-angle detection option planned at the high-intensity/extended Q-range SANS diffractometer KWS-2 combining experiments and McStas simulations By journals.iucr.org Published On :: 2024-06-27 For a reliable characterization of materials and systems featuring multiple structural levels, a broad length scale from a few ångström to hundreds of nanometres must be analyzed and an extended Q range must be covered in X-ray and neutron scattering experiments. For certain samples or effects, it is advantageous to perform such characterization with a single instrument. Neutrons offer the unique advantage of contrast variation and matching by D-labeling, which is of great value in the characterization of natural or synthetic polymers. Some time-of-flight small-angle neutron scattering (TOF-SANS) instruments at neutron spallation sources can cover an extended Q range by using a broad wavelength band and a multitude of detectors. The detectors are arranged to cover a wide range of scattering angles with a resolution that allows both large-scale morphology and crystalline structure to be resolved simultaneously. However, for such analyses, the SANS instruments at steady-state sources operating in conventional monochromatic pinhole mode rely on additional wide-angle neutron scattering (WANS) detectors. The resolution must be tuned via a system of choppers and a TOF data acquisition option to reliably measure the atomic to mesoscale structures. The KWS-2 SANS diffractometer at Jülich Centre for Neutron Science allows the exploration of a wide Q range using conventional pinhole and lens focusing modes and an adjustable resolution Δλ/λ between 2 and 20%. This is achieved through the use of a versatile mechanical velocity selector combined with a variable slit opening and rotation frequency chopper. The installation of WANS detectors planned on the instrument required a detailed analysis of the quality of the data measured over a wide angular range with variable resolution. This article presents an assessment of the WANS performance by comparison with a McStas [Willendrup, Farhi & Lefmann (2004). Physica B, 350, E735–E737] simulation of ideal experimental conditions at the instrument. Full Article text
high Revealing nanoscale sorption mechanisms of gases in a highly porous silica aerogel By journals.iucr.org Published On :: 2024-08-19 Geological formations provide a promising environment for the long-term and short-term storage of gases, including carbon dioxide, hydrogen and hydrocarbons, controlled by the rock-specific small-scale pore structure. This study investigates the nanoscale structure and gas uptake in a highly porous silica aerogel (a synthetic proxy for natural rocks) using transmission electron microscopy, X-ray diffraction, and small-angle and ultra-small-angle neutron scattering with a tracer of deuterated methane (CD4) at pressures up to 1000 bar. The results show that the adsorption of CD4 in the porous silica matrix is scale dependent. The pore space of the silica aerogel is fully accessible to the invading gas, which quickly equilibrates with the external pressure and shows no condensation on the sub-nanometre scale. In the 2.5–50 nm pore size region a classical two-phase adsorption behaviour is observed. The structure of the aerogel returns to its original state after the CD4 pressure has been released. Full Article text
high The promise of GaAs 200 in small-angle neutron scattering for higher resolution By journals.iucr.org Published On :: 2024-08-27 The Q resolution in Bonse–Hart double-crystal diffractometers is determined for a given Bragg angle by the value of the crystallographic structure factor. To date, the reflections Si 220 or Si 111 have been used exclusively in neutron scattering, which provide resolutions for triple-bounce crystals of about 2 × 10−5 Å−1 (FWHM). The Darwin width of the GaAs 200 reflection is about a factor of 10 smaller, offering the possibility of a Q resolution of 2 × 10−6 Å−1 provided crystals of sufficient quality are available. This article reports a feasibility study with single-bounce GaAs 200, yielding a Q resolution of 4.6 × 10−6 Å−1, six times superior in comparison with a Si 220 setup. Full Article text
high Multidimensional Rietveld refinement of high-pressure neutron diffraction data of PbNCN By journals.iucr.org Published On :: 2024-09-05 High-pressure neutron powder diffraction data from PbNCN were collected on the high-pressure diffraction beamline SNAP located at the Spallation Neutron Source (SNS) of Oak Ridge National Laboratory (Tennessee, USA). The diffraction data were analyzed using the novel method of multidimensional (two dimensions for now, potentially more in the future) Rietveld refinement and, for comparison, employing the conventional Rietveld method. To achieve two-dimensional analysis, a detailed description of the SNAP instrument characteristics was created, serving as an instrument parameter file, and then yielding both cell and spatial parameters as refined under pressure for the first time for solid-state cyanamides/carbodiimides. The bulk modulus B0 = 25.1 (15) GPa and its derivative B'0 = 11.1 (8) were extracted for PbNCN following the Vinet equation of state. Surprisingly, an internal transition was observed beyond 2.0 (2) GPa, resulting from switching the bond multiplicities (and bending direction) of the NCN2− complex anion. The results were corroborated using electronic structure calculation from first principles, highlighting both local structural and chemical bonding details. Full Article text
high Upgraded front ends for SLS 2.0 with next-generation high-power diaphragms and slits By journals.iucr.org Published On :: 2024-10-22 The upgrade of the Swiss Light Source, called SLS 2.0, necessitates comprehensive updates to all 18 user front ends. This upgrade is driven by the increased power of the synchrotron beam, reduced floor space, changing source points, new safety regulations and enhanced beam properties, including a brightness increase by up to a factor of 40. While some existing front-end components are being thoroughly refurbished and upgraded for safety reasons, other components, especially those designed to tailor the new synchrotron beam, are being completely rebuilt. These new designs feature innovative and enhanced cooling systems to manage the high-power load and meet new requirements such as mechanical stability and compact footprints. Full Article text
high High-transmission spectrometer for rapid resonant inelastic soft X-ray scattering (rRIXS) maps By journals.iucr.org Published On :: 2024-09-30 The design and first results of a high-transmission soft X-ray spectrometer operated at the X-SPEC double-undulator beamline of the KIT Light Source are presented. As a unique feature, particular emphasis was placed on optimizing the spectrometer transmission by maximizing the solid angle and the efficiencies of spectrometer gratings and detector. A CMOS detector, optimized for soft X-rays, allows for quantum efficiencies of 90% or above over the full energy range of the spectrometer, while simultaneously offering short readout times. Combining an optimized control system at the X-SPEC beamline with continuous energy scans (as opposed to step scans), the high transmission of the spectrometer, and the fast readout of the CMOS camera, enable the collection of entire rapid resonant inelastic soft X-ray scattering maps in less than 1 min. Series of spectra at a fixed energy can be taken with a frequency of up to 5 Hz. Furthermore, the use of higher-order reflections allows a very wide energy range (45 to 2000 eV) to be covered with only two blazed gratings, while keeping the efficiency high and the resolving power E/ΔE above 1500 and 3000 with low- and high-energy gratings, respectively. Full Article text
high October Report Highlights Big Gains in Crypto Mining Efficiency and Expansion By www.streetwisereports.com Published On :: Wed, 06 Nov 2024 00:00:00 PST Source: Streetwise Reports 11/06/2024 Terawulf Inc. (WULF:NASDAQ) has reported its October 2024 production and operations. Read more about the companys mining efficiency gains, expansion plans, and high-performance computing initiatives.Terawulf Inc. (WULF:NASDAQ) has reported its October 2024 production and operations. The report included significant advancements in self-mining with an operational capacity reaching 8.1 exahash per second (EH/s). This marks a 62% increase from the prior year. The company mined a total of 150 bitcoins during the month, averaging approximately 4.8 bitcoins per day, at a power cost of US$36,789 per bitcoin mined or about US$0.048 per kWh (kilowatt-hour). To improve efficiency, TeraWulf continued its miner refresh program at its Lake Mariner facility, replacing older models with upgraded S19 XP miners following its sale of interest in the Nautilus Cryptomine facility, which enabled additional hardware acquisitions. Focusing on high-performance computing (HPC) infrastructure, TeraWulf's aim is to establish 72.5 MW HPC hosting capacity at Lake Mariner by Q2 2025. October's operational hash rate averaged 6.8 EH/s, with adjustments made for demand response events and performance optimization measures to enhance profitability. Construction on the company's 20 MW HPC hosting facility, CB-1, remains on schedule for Q1 2025, and a larger 50 MW HPC facility, CB-2, is expected by Q2 2025. The recent sale of TeraWulf's equity interest in Nautilus and new financing through convertible notes are anticipated to support these growth initiatives. Sean Farrell, Senior Vice President of Operations at TeraWulf, explained in the press release, "October marked another productive month, with TeraWulf mining 150 bitcoin and sustaining an average daily production of around 5 bitcoin . . . In line with our previously outlined plans, we are accelerating the transition to more efficient mining hardware by replacing older miners at Lake Mariner with S19 XP models. We are also working closely with Bitmain's warranty department on a recovery plan to repair and replace 1.5 EH of mining equipment with a target completion by the end of the year. Furthermore, we have established a dedicated Business Development and Performance Optimization team focused on integrating advanced IT and software solutions to improve our operational hash rate and overall efficiency. Building 5, which has been designed to handle higher heat exhaust of the latest generation miners, remains on track to be operational in Q1 2025." Why Crypto Mining? The cryptocurrency mining sector has seen recent momentum, bolstered by the U.S. election results and the evolving landscape for Bitcoin. As Benzinga reported on November 6, bitcoin mining stocks experienced notable gains following the U.S. presidential election, which led to Bitcoin reaching record highs. The outcome was anticipated to benefit U.S.-focused mining companies as pro-crypto policies, including a preference for domestic bitcoin production, gained prominence. Benzinga noted that Trump had previously expressed support for more bitcoin mining within the U.S., a stance that influenced broader market optimism in the days following his election. On November 4, Yahoo! Finance highlighted the growing trend among Bitcoin miners to integrate artificial intelligence (AI) to power a "new industrial revolution." As described by Rob Nelson, who emphasized the impact of cryptocurrency mining as a vehicle for both economic and technological change. This trend has driven miners to secure deals within the AI sector, given the synergies in computational power required for both cryptocurrency and AI initiatives. Nelson projected that this cross-industry expansion could have far-reaching effects, creating value for both miners and AI-focused enterprises. Additionally, a November 6 report from Time explored the significance of the recent Presidential election outcome for the crypto industry's future regulatory environment. According to Time, Trump's support for the industry included ambitions to boost the country's bitcoin mining footprint, which aligned with crypto PACs' efforts to secure pro-crypto candidates. The article reported that these advocacy groups saw the election as an opportunity to reshape crypto regulation and encourage growth in U.S.-based bitcoin mining. TeraWulf's Catalysts TeraWulf's recent initiatives set a foundation for further growth and operational efficiency. According to the company's investor presentation, the sale of its 25% equity interest in the Nautilus facility enhances liquidity. This enables TeraWulf to reinvest in its flagship Lake Mariner site for both HPC and AI expansion. The transaction also reduces exposure to the expiring Nautilus 2¢ power contract by 2027, positioning the company to benefit from projected power price increases at Lake Mariner. This strategic realignment is anticipated to improve fleet efficiency, with an upgraded mining fleet targeting 13 EH/s by Q1 2025, supported by the deployment of next-gen S21 Pro miners. What Experts Are Saying... On November 5, 2024, Roth MKM analyst Darren Aftahi assigned TeraWulf a "Buy" rating and set a price target of US$7.50. Roth highlighted optimism around the company's expansion and potential in high-performance computing (HPC) and bitcoin mining. Roth noted that TeraWulf's planned 72.5 MW of HPC capacity by Q2 2025 could generate annualized revenue of approximately US$90 million, with over US$60 million in profit. [OWNERSHIP_CHART-11184] The report highlighted the completion of TeraWulf's initial 2.5 MW HPC project and its upcoming 20 MW facility, which remains on track for Q1 2025. Roth analysts pointed to the operational progress at TeraWulf's Lake Mariner facility, emphasizing the company's improvements in mining efficiency with new S19 XP models, which brought its machine efficiency to 22 J/TH. Ownership and Share Structure According to Refinitiv, management and insiders hold 6.67% of TeraWulf. Of them, Co-founder, COO, and CTO Nazar M. Khan holds the most, with 4.43%. Strategic investors hold 21.37%. Of them, Riesling Power LLC holds the most at 5.23%, Baryshore Capital LLC holds 4.77%, Revolve Capital LLC has 4.67%, Opportunity Four of Parabolic Ventures owns 2.46%, and Lake Harriet Holdings LLC has 1.90%. Institutions have 45.11%. The largest holders there are The Vanguard Group at 6.12%, BlackRock Instituional Trust with 4.22%, Two Sigma Investments LP at 2.28%, Beryl Capital Management LLC holds 1.74%, and Geode Capital Management LLC has 1.66%. The rest is retail.TeraWulf has a market cap of US$2,375.93 million and 275.29 million free float shares. Their 52-week range is US$ 0.8911 - 7.28. Sign up for our FREE newsletter at: www.streetwisereports.com/get-newsImportant Disclosures:1) James Guttman wrote this article for Streetwise Reports LLC and provides services to Streetwise Reports as an employee. 2) This article does not constitute investment advice and is not a solicitation for any investment. Streetwise Reports does not render general or specific investment advice and the information on Streetwise Reports should not be considered a recommendation to buy or sell any security. Each reader is encouraged to consult with his or her personal financial adviser and perform their own comprehensive investment research. By opening this page, each reader accepts and agrees to Streetwise Reports' terms of use and full legal disclaimer. Streetwise Reports does not endorse or recommend the business, products, services or securities of any company. For additional disclosures, please click here. ( Companies Mentioned: WULF:NASDAQ, ) Full Article
high High-Grade Uranium Discovery Confirms Potential at Northern Saskatchewan Projects By www.streetwisereports.com Published On :: Fri, 18 Oct 2024 00:00:00 PST Source: Streetwise Reports 10/18/2024 Aero Energy Ltd. (AERO:TSXV; AAUGF:OTC; UU3:FRA) has announced significant advancements at its Murmac and Sun Dog uranium projects in Northern Saskatchewan. Read how this and a CA$2.5-million non-brokered private placement aim the company towards further exploration. Aero Energy Ltd. (AERO:TSXV; AAUGF:OTC; UU3:FRA) has announced significant advancements at its Murmac and Sun Dog uranium projects in Northern Saskatchewan, with the first drill program revealing high-grade uranium potential. Situated near Uranium City on the Athabasca Basin's northern margin, the projects aim to capitalize on basement-hosted uranium deposits similar to high-grade discoveries in the region. The initial drill campaign completed 16 holes, targeting 12 key areas, with 12 holes yielding anomalous radioactivity. A major highlight is the new high-grade uranium discovery in drill hole M24-017, which intersected 8.4 meters of mineralization at 0.3% U3O8, including assays peaking at 13.8% U3O8 at just 64 meters below surface. The results confirm Aero's exploration model, which focuses on basement-hosted deposits within graphitic structures, a common feature in Athabasca Basin uranium deposits like Arrow and Triple R. "From the launch of the company in January, we took a very diligent yet aggressive approach to discovery," stated Galen McNamara, CEO of Aero Energy. "The combination of historical data and the results from the first drill program serve as evidence that basement-hosted mineralization akin to the large deposits beneath and adjacent to the Athabasca Basin is present in the area." The Murmac project spans 25,607 acres and holds a production legacy of approximately 70 million pounds of U3O8. Similarly, the 48,443-acre Sun Dog property hosts the historic Gunnar uranium mine, which once held the title of the world's largest uranium producer. Past exploration focused on fault-hosted mineralization, missing the basement-hosted uranium potential that Aero's recent findings have validated. Recent exploration efforts included a VTEM Plus survey, flown over 3,350 kilometers, identifying graphite-rich rocks that support Aero's exploration thesis. Additionally, two new occurrences of strong radioactivity were identified at surface-level scout locations: Target A15 showed 60,793 counts per second, and Target P4 displayed 13,533 counts per second. Summer 2024 drilling included 1,550 meters at Murmac and 1,600 meters at Sun Dog, highlighting shallow, high-grade potential in both areas. In parallel, Aero Energy has announced a CA$2.5 million non-brokered private placement to support further exploration. The proceeds from flow-through units will fund work programs across Murmac, Sun Dog, and the Strike property, with the remaining funds allocated to general working capital. Why Uranium? The uranium sector has recently experienced strong growth, largely driven by increasing global demand and efforts to diversify from Russian supply chains. On September 30, The New York Times discussed the resurgence in Western uranium production, highlighting that "uranium mines are ramping up across the West, spurred by rising demand for electricity and federal efforts to cut Russia out of the supply chain." Aero Energy's recent discoveries and forthcoming winter drilling plans at Murmac and Sun Dog reflect this trend, with CEO Galen McNamara remarking, "The combination of historical data and the results from the first drill program serve as evidence that basement-hosted mineralization . . . is present in the area," suggesting strong potential for the Canadian uranium market to contribute to non-Russian nuclear fuel supplies. Jeff Clark of The Gold Advisor highlighted his continued confidence in the company by stating, "I remain overweight the stock." On October 9, Reuters reported that demand from U.S. buyers has been on the rise, as "a strong rise in demand from its U.S. customers" pushed Orano's recent plans to expand uranium enrichment in the United States and France. This shift underscores Aero Energy's recent investments in Northern Saskatchewan, where the company has identified high-grade uranium mineralization in both the Murmac and Sun Dog projects, aiming to meet future supply demands with a focus on basement-hosted deposits. As Forbes reported on October 11, the uranium market experienced renewed momentum after Russian President Vladimir Putin hinted at the possibility of a ban on uranium exports to Western nations. This suggestion "jolted the uranium market," which had been declining after peaking earlier in the year. The price of uranium rebounded to US$83.50 per pound, reflecting rising concerns about potential supply disruptions. Citi analysts noted that “Russia supplies close to 12% of U3O8, 25% of UF6, and 35% of EUP to international markets,” underscoring the challenges that Western nations, particularly the U.S. and Europe, could face in replacing these critical materials. This market dynamic positions uranium companies operating outside of Russia, like those in the Athabasca Basin, to benefit from supply gaps and heightened demand. MSN reported on October 13 that the UK's nuclear power capacity is set to decrease dramatically in the coming years, with the planned closure of four out of five remaining nuclear plants by 2028. This reduction in capacity is expected to increase pressure on global uranium supplies as demand for nuclear energy continues to rise amid efforts to meet climate goals. The ongoing shift toward low-carbon energy sources, coupled with the planned closures, could create further supply constraints and drive demand for uranium from alternative sources. Aero's Catalysts According to the company's October 2024 investor presentation, the ongoing development at Murmac and Sun Dog highlights Aero Energy's strategy to enhance shareholder value by targeting high-grade uranium deposits in underexplored regions. Aero has leveraged recent technology investments, including VTEM Plus aerial surveys, which identified graphite-rich formations favorable for uranium. The exploration efforts build on the CA$7.6 million previously invested by project partners Fortune Bay and Standard Uranium, which has contributed to refining the drill targets. As Aero works with its partners to maximize the impact of this winter's drilling program, the company's strategic location on the north rim of the Athabasca Basin positions it well to expand these discoveries and attract continued investor interest. The recently announced CA$2.5 million private placement will further strengthen Aero's financial capacity to carry out its targeted drill campaigns and exploration work. Analyzing Aero Jeff Clark of The Gold Advisor, in his October 17 update, noted that Aero Energy has "identified more than 70 kilometers of strike to test for high-grade basement-hosted uranium," emphasizing the company's significant exploration potential in a region known for some of the world's richest uranium deposits. Clark further commented on Aero Energy's recent results, underscoring the importance of drill hole M24-017, which intersected 8.4 meters of uranium mineralization, grading 0.3% U3O8, with assays reaching as high as 13.8% U3O8. He stated, "While not a discovery hole, per se, this hole underscores the company's thesis that these two projects are prospective for the same type of uranium mineralization as Arrow and Triple R." This observation reinforces Aero Energy's exploration model, which targets basement-hosted uranium deposits similar to those found at other significant Athabasca Basin discoveries. [OWNERSHIP_CHART-11173] Additionally, Clark expressed optimism regarding Aero Energy's current valuation and future prospects, recommending it as a strong buy at current levels. He highlighted his continued confidence in the company by stating, "I remain overweight the stock," suggesting that Aero Energy presents a compelling opportunity for speculative investors in the uranium exploration space. The recently announced CA$2.5 million private placement was also acknowledged by Clark as a necessary step to fund further exploration activities. While he expressed some caution about potential dilution, he affirmed his overall support for the financing, noting that "its projects are very much worthy of follow-up." Ownership and Share Structure According to Refinitiv, management and insiders own 3.11% of Aero Energy. Of those, CEO Galen McNamara has the most at 2.97%. Institutions owns 4.79% with MMCAP Asset Management holding 3.89%. The rest is retail. Aero has 92.3 million free float shares and a market cap of CA$4.5 million. The 52 week range is CA$0.040–$0.26. Sign up for our FREE newsletter at: www.streetwisereports.com/get-newsImportant Disclosures:1) James Guttman wrote this article for Streetwise Reports LLC and provides services to Streetwise Reports as an employee. 2) This article does not constitute investment advice and is not a solicitation for any investment. Streetwise Reports does not render general or specific investment advice and the information on Streetwise Reports should not be considered a recommendation to buy or sell any security. Each reader is encouraged to consult with his or her personal financial adviser and perform their own comprehensive investment research. By opening this page, each reader accepts and agrees to Streetwise Reports' terms of use and full legal disclaimer. Streetwise Reports does not endorse or recommend the business, products, services or securities of any company. For additional disclosures, please click here. ( Companies Mentioned: AERO:TSXV;AAUGF:OTC;UU3:FRA, ) Full Article
high Silver Co. Releases High-Grade Results From Golden Triangle Drilling By www.streetwisereports.com Published On :: Tue, 05 Nov 2024 00:00:00 PST Source: Streetwise Reports 11/05/2024 Dolly Varden Silver Corp. (DV:TSX.V; DOLLF:OTCQX) releases new results from its 2024 drilling program at its Kitsault Valley project in British Columbia's Golden Triangle. One analyst says the company is an "attractive target" for large precious metal producers.Dolly Varden Silver Corp. (DV:TSX.V; DOLLF:OTCQX) released results from five drill holes from its completed 2024 drilling program at its Kitsault Valley project in British Columbia's Golden Triangle. In total, the program drilled 69 holes for 31,726 meters — 41 holes totaling more than 15,000 meters at the Dolly Varden area and 28 holes totaling more than 16,000 meters at Homestake Ridge. Highlights of Monday's release include one hole from the Homestake Silver Deposit that found 12.23 grams per tonne gold (g/t Au) and 84 g/t silver (Ag) over 34.93 meters with high-grade breccia veins that included 166 g/t Au and 675 g/t Ag over 0.97 meters. "The identification of a gold-rich, wide and high-grade area within the Homestake Silver Deposit is highly encouraging," said Chief Executive Officer Shawn Khunkhun. "Our geological team is encouraged by overlapping mineralizing phases of silver and gold-rich veins and breccias; the deposit remains open for expansion." Technical Analyst Clive Maund, writing on Sunday, called Dolly Varden "one of the best pure silver companies around." The stock's "breakout at end of last month/early this month was on big volume means it was genuine," Maund wrote. The stock is at a "classic buy spot, although we should remain aware that it could zigzag a little lower over the short-term, but that said it looks like a strong buy here." Highlights From Results Highlights from the Homestake Silver Deposit include: Hole HR24-432: Mineralized envelope including veins: 8.85 g/t Au and 5 g/t Ag over 48.23 meters, including an internal zone of stronger breccia vein intervals grading 29.24 g/t Au and 16 g/t Ag over 13.94 meters, including one breccia vein grading 701 g/t Au and 184 g/t Ag over 0.54 meters. Hole HR24-435: Mineralized envelope including veins: 4.64 g/t Au and 38 g/t Ag over 100.80 meters, including an internal interval of stronger breccia vein mineralization grading 12.23 g/t Au and 84 g/t Ag over 34.93 meters. High-grade breccia veins include 166 g/t Au and 675 g/t Ag over 0.97 meters. Hole HR24-442: Vein breccia zone: 4.58 g/t Au over 9.95 meters, including 14.96 g/t Au over 1.69 meters. "Results from the five holes in this release suggest that the plunge of mineralization at Homestake Silver has a similar orientation as the Homestake Main Deposit, located 300 meters to the northwest," the company said in a release. "The average grades within these core areas are higher, on a precious metal silver equivalent basis, than the average grade of the silver deposits at the Dolly Varden property further south, due to the increased gold content at the Homestake Ridge Deposits." Technical Analyst Clive Maund, writing on Sunday, called Dolly Varden "one of the best pure silver companies around." Drill holes HR24-442 and HR24-445 are step-outs and encountered the mineralized and altered structural corridor of Homestake Silver, the company said. Drill hole HR24-442 intersected a mineralized vein breccia stockwork zone grading 4.58 g/t Au over 9.95 meters, including individual breccias with stronger pyrite mineralization grading 14.96 g/t Au over 1.69 meters. The Homestake Ridge deposits are interpreted as structurally controlled, multi-phase epithermal vein stockwork and vein breccia system hosted in Jurassic Hazelton volcanic rocks, Dolly Varden noted. Mineralization consists of pyrite plus galena and sphalerite with visible gold in a breccia matrix within a silica breccia vein system. "The northwest orientation of the main Homestake structural trend appears to have numerous subparallel internal structures that are interpreted to form the controls for higher grade gold and silver shoots within a broader mineralized envelope at the Homestake Silver deposit," the company said. "The main structural corridor dips steeply to the northeast at Homestake Main and rolls to vertical or steeply southwest at Homestake Silver." Analyst's Response: 'Boom' Jeff Valks, Senior Analyst for The Gold Advisor newsletter, reacted to the results with the word "BOOM." "Dolly Varden Silver reports more high-grade drill results from its 2024 exploration program at the Homestake Silver Deposit in British Columbia's Golden Triangle," he wrote on Monday. "Results from five drill holes have confirmed significant gold and silver mineralization in an area targeted within the plunge of a previously undrilled high-grade zone, signaling potential expansion opportunities." Jeff Valks, Senior Analyst for The Gold Advisor newsletter, reacted to the results with the word "BOOM." We look forward to the remaining results." Vaks wrote. "In the meantime, the stock is flat as I write but is up over 35% year-to-date. It's not too late to buy, it's down from its recent spike, and as (editor) Jeff (Clark) has said, this is a core holding for the silver bull market. Use a stink bid if you're looking for shares. Both Jeff and I hold long positions." Analyst Marcus Giannini of Haywood Capital Markets noted in a recent research note that Dolly Varden continues to "push the margins of known high-grade mineralization" at the project. Gianini gave the stock a Buy rating with a CA$2.40 per share target price. "We continue to view Dolly's high-grade endowment as an increasingly attractive target for larger North American-focused precious metal producers," he noted. The Catalyst: Analysts Point to Patience While it has chased the record highs gold has been setting this year, silver recently broke through US$35 per ounce, reflecting a year-to-date gain of about 47%. It has since settled but held to the "crucial US$32.50 level," according to Christopher Lewis of FX Empire on Monday. "Keep in mind that this is a market that is extraordinarily volatile and, of course, will continue to be noisy over the next couple of days as we get election results in the United States," Lewis wrote. "And of course, we also get the Federal Reserve interest rate decision on Thursday, both of which could cause chaos." Lewis said he thinks the "least likely path is lower." "I still favor an upside move, but I recognize that we are definitely in a little bit of a holding pattern," he wrote. "Having said that, if we do see momentum to the upside, then there's really not a whole lot here that could keep this market from trying to challenge the (US$)35 level again, obviously, a large round psychologically significant figure, but we'll just have to wait and see how that plays out." The most conductive element in nature, silver is used to coat electrical contacts in computers, phones, cars, and appliances. It's also an important element in solar technology. Mordor Intelligence noted that the white metal is expected to register a compound annual growth rate (CAGR) of more than 5% between 2024 and 2029. Newsletter editor Brien Lundin encouraged investors not to get discouraged, as any price drop-off is temporary, he said. He expects the silver price to soar when the U.S. Federal Reserve doubles down on its efforts to get interest rates much lower, he wrote on Oct. 23. [OWNERSHIP_CHART-5439] Based on silver's charts, Ron Struthers of Struthers Resource Stock Report also predicted a major run-up in the silver price. "Back in April or early May, I highlighted the breakout from a cup and handle formation and [that] that would lead to a major upside move. This is now confirmed," he wrote on Oct. 23. Ownership and Share Structure According to the company's latest corporate presentation, 50% of its stock is held by institutional investors, including Fidelity Management & Research Company LLC, Sprott Asset Management LP, U.S. Global Investors Inc., and Delbrook. About 41% is with strategic investors, including 17% with Fury Gold Mines, 14% with Hecla, and Eric Sprott owns 10% himself. The rest, 9%, is with retail and high-net-worth investors. The company has 301.16 million outstanding shares. Its market cap is CA$380.72 million, and its 52-week trading range is CA$0.62–1.46 per share. Sign up for our FREE newsletter at: www.streetwisereports.com/get-newsImportant Disclosures: Dolly Varden Silver Corp. is a billboard sponsor of Streetwise Reports and pays SWR a monthly sponsorship fee between US$4,000 and US$5,000. As of the date of this article, officers and/or employees of Streetwise Reports LLC (including members of their household) own securities of Dolly Varden Silver Corp. Steve Sobek wrote this article for Streetwise Reports LLC and provides services to Streetwise Reports as an employee. This article does not constitute investment advice and is not a solicitation for any investment. Streetwise Reports does not render general or specific investment advice and the information on Streetwise Reports should not be considered a recommendation to buy or sell any security. Each reader is encouraged to consult with his or her personal financial adviser and perform their own comprehensive investment research. By opening this page, each reader accepts and agrees to Streetwise Reports' terms of use and full legal disclaimer. Streetwise Reports does not endorse or recommend the business, products, services or securities of any company. For additional disclosures, please click here. ( Companies Mentioned: DV:TSX.V; DOLLF:OTCQX, ) Full Article
high Drill Program Targets High-Grade Gold Veins in British Columbia By www.streetwisereports.com Published On :: Wed, 06 Nov 2024 00:00:00 PST Source: Streetwise Reports 11/06/2024 Independence Group NL (IGO:ASX) has begun a comprehensive diamond drill program at its fully-owned 3Ts Project, located in British Columbia.Read more about the 25 planned drill holes aimed at unlocking high-grade intercepts and the promising exploration targets at the 3Ts Project. Independence Gold Corp. (IGO:TSX.V; IEGCF:OTCMKTS) has begun a comprehensive diamond drill program at its fully-owned 3Ts Project, located in British Columbia. Positioned 16 km from Artemis Gold Inc.'s Blackwater Project, the 3Ts Project covers 8,840 hectares within a prolific epithermal quartz-carbonate vein district on the Nechako Plateau. The program will consist of approximately 25 drill holes, totaling a minimum of 7,500 meters. The targets are the Ted-Mint and Tommy Vein Systems, with a primary emphasis on unexplored depth zones to identify high-grade intercepts for mineral resource expansion. The 3Ts Project encompasses multiple identified veins, with strike lengths from 50 to over 1,100 meters and true widths of up to 25 meters. Additional exploration will be directed at the Ian, Johnny, and Larry Veins, focusing on mineralization both along strike and at depth. The Ootsa and Balrog targets, identified through geophysical and geological data collected during the summer 2024 exploration program, are also set to undergo further investigation. President and CEO Randy Turner stated in the press release, "We look forward to building on the success of recent drill programs at 3Ts. With a larger and more extensive drill program planned, including deeper holes to test the major vein systems below the microdiorite sill and further testing of the newly discovered Ootsa and Balrog targets, we anticipate a very busy and exciting year ahead." Upon hearing this news, Jeff Clark of The Gold Advisor wrote, "And they're off! This is the THIRD drill program this year at 3Ts, an aggressive schedule that, as investors, we're very happy to see." He noted that these results will help expand the current resource. He continued, "Remember, management just raised a whopping US$6.65 million, more than double the initial goal, due to strong investor interest. They thus have the financial firepower to conduct all this drilling before winter sets in. The stock isn't reacting to the news, but this isn't something that would normally have a big impact on it. It's cooled from its recent spike so offers a very attractive entry point if you don't have the shares you want. This is an overweight position for me, and it's my belief we'll see more spikes just like the one we witnessed. More news and potential catalysts ahead. This is definitely one to own for the gold bull market." Looking Into Gold On October 29, Kitco reported that gold prices approached US$2,800. This reflects a substantial 35% increase for the year. According to the report, this growth resulted from multiple factors, including geopolitical conflicts, Federal Reserve interest rate normalization, strong central bank demand, and political uncertainties surrounding the upcoming presidential election. Analysts described these elements as a "perfect storm," which significantly bolstered investor sentiment and reinforced gold's appeal as a hedge against economic instability. "This is definitely one to own for the gold bull market," Jeff Clark of The Gold Advisor Wrote. LiveMint, on October 30, noted the strong performance of precious metals, emphasizing that silver had outpaced gold over the past year. Ankit Gohel from LiveMint mentioned, "Gold has delivered a substantial return of over 33.5% since Dhanteras last year," but highlighted that silver had achieved an even more impressive rally of over 40.5%. Despite this, gold continued to attract attention, with Chintan Mehta, CEO of Abans Holdings, emphasizing gold's role as a safe haven during times of uncertainty. He said, "Gold stands out in times of uncertainty . . . It's a complete safe-haven unlike silver, which always has that industrial component attached to it, adding an extra layer of risk." In a November 4 article, Egon von Greyerz of Matterhorn Asset Management provided a historical perspective on gold's consistent role in preserving wealth. Von Greyerz discussed how gold had risen 78 times since 1971, when the dollar lost its gold backing, emphasizing that "gold held in the investor's name in safe vaults and jurisdictions outside the financial system is the ultimate form of wealth preservation." He argued that gold's ascent had only just begun, driven by the devaluation of fiat currencies and ongoing global debt expansion. Independence Catalysts According to the company's September 2024 investor presentation, the 3Ts Project remains a high-priority asset with substantial growth potential. The updated NI 43-101 compliant resource estimate for the Tommy, Ted, and Mint veins, totaling 522,330 ounces of gold and 13.83 million ounces of silver, is expected to expand with new discoveries and continued drilling. Recent metallurgical testing has returned gold recoveries of up to 97.9%, and the strategic location near Artemis Gold's Blackwater Mine adds further credibility to the project's prospects. [OWNERSHIP_CHART-7643] The fall 2024 drill program, with a budget of CA$4.5 million, will test high-grade zones and underexplored targets, building on over 63,000 meters of historical drilling. Additionally, new targets such as the Balrog and Ootsa anomalies present significant exploration upside, underscoring the project's potential for resource expansion and discovery. Ownership and Share Structure According to Refinitiv, about 4.38% of the company is held by insiders and management. 7.97% is with strategic investor Newmont Corp. The rest is retail. Its market cap is CA$29.28 million with 167.8 million shares outstanding. It trades in a 52-week range of CA$0.34 and CA$0.12. Sign up for our FREE newsletter at: www.streetwisereports.com/get-newsImportant Disclosures:1) James Guttman wrote this article for Streetwise Reports LLC and provides services to Streetwise Reports as an employee. 2) This article does not constitute investment advice and is not a solicitation for any investment. Streetwise Reports does not render general or specific investment advice and the information on Streetwise Reports should not be considered a recommendation to buy or sell any security. Each reader is encouraged to consult with his or her personal financial adviser and perform their own comprehensive investment research. By opening this page, each reader accepts and agrees to Streetwise Reports' terms of use and full legal disclaimer. Streetwise Reports does not endorse or recommend the business, products, services or securities of any company. For additional disclosures, please click here. ( Companies Mentioned: IGO:TSX.V;IEGCF:OTCMKTS, ) Full Article
high FORT Economist James Meldrum and the Wildfire Research Team win the 2024 CO-LABS Governor’s Awards for High Impact Research: Pathfinding Partnerships Award By www.usgs.gov Published On :: Mon, 4 Nov 2024 15:23:44 EST The Pathfinding Partnerships Award from CO-LABS recognizes impactful, collaborative research projects organized by four or more research entities, including federal labs, in Colorado. This year, the Wildfire Research (WiRē) team received this award for their support of evidence-based community wildfire education to help communities live with wildfire. Full Article
high Exploration Expansion Targets High-Grade Copper Potential in Nevada By www.streetwisereports.com Published On :: Tue, 05 Nov 2024 00:00:00 PST Giant Mining Corp. (CSE: BFG; OTC:BFGFF; FWB:YW5) announced the expansion of its surface exploration program at the Majuba Hill copper-silver deposit in Pershing County, Nevada. Read more to learn about the promising high-grade copper findings and the project's potential impact on the EV and renewable energy sectors. Full Article CSE: BFG;OTC:BFGFF;FWB:YW5
high High-Grade Rhodium Intercepts Bolster Montana Critical Minerals Expansion By www.streetwisereports.com Published On :: Mon, 04 Nov 2024 00:00:00 PST Stillwater Critical Minerals Corp. (PGE:TSX.V; PGEZF:OTCQB; J0G:FSE) has announced new assay results from its ongoing resource expansion drilling at the Stillwater West PGE-Ni-Cu-Co + Au project. Read more for detailed insights into the high-grade rhodium intercepts and resource expansion potential. Full Article PGE:TSX.V; PGEZF:OTCQB; J0G:FSE
high High-Grade Uranium Discovery Confirms Potential at Northern Saskatchewan Projects By www.streetwisereports.com Published On :: Fri, 18 Oct 2024 00:00:00 PST Aero Energy Ltd. (AERO:TSXV; AAUGF:OTC; UU3:FRA) has announced significant advancements at its Murmac and Sun Dog uranium projects in Northern Saskatchewan. Read how this and a CA$2.5-million non-brokered private placement aim the company towards further exploration. Full Article
high High-Impact Mining Conferences Set the Stage for Key Gold Project Updates By www.streetwisereports.com Published On :: Mon, 11 Nov 2024 00:00:00 PST Dryden Gold Corp. (DRY:TSXV; DRYGF:OTCQB) has announced its participation in three significant mining investment conferences scheduled for November 2024. Read more about the company's plans to showcase major project updates and connect with global investors at these key events. Full Article DRY:TSXV; DRYGF:OTCQB
high High-Grade Gold Strikes in Brazil as New Drilling Results Reveal Untapped Potential By www.streetwisereports.com Published On :: Mon, 11 Nov 2024 00:00:00 PST GoldMining Inc. (GOLD:TSX; GLDG:NYSE.American) released results from its ongoing 2024 auger drilling program at the Sao Jorge Project in the Tapajos gold district, Para State, Brazil. Read more about high-grade gold intercepts and new exploration targets at So Jorge as GoldMining extends its search in Tapajs. Full Article
high NCDOT releases recommendations on widening of Highway 16 South in Catawba County By www.ncdot.org Published On :: Mon, 21 Nov 2011 12:35:00 EST The North Carolina Department of Transportation has released recommendations on widening of Highway 16 South in Catawba County (within the minutes of public meetings). Link to project maps: http://www.ncdot.org/doh/preconstruct/highway/roadway/hearingmaps_by_county/county/Catawba.html Full Article Public Notice News Release FYI
high North Carolina Highway Patrol presents Citizen Life Saving Award to two Catawba County paramedics. By www.catawbacountync.gov Published On :: Tue, 6 Dec 2011 11:05:00 EST Colonel Michael W. Gilchrist, Commander of the Highway Patrol, presented the awards to EMT Paramedic and Crew Chief Brad Harris and EMT Paramedic Eric Jones for their role in pulling a person from a burning vehicle. Full Article News Release FYI Please Choose
high High-Quality Education, Early Screening Are Key To Nurturing Minority Students With Special Needs or Talents By Published On :: Wed, 16 Jan 2002 06:00:00 GMT To ensure that minority students who are poorly prepared for school are not assigned to special education for that reason, educators should be required to first provide them with high-quality instruction and social support in a general education classroom before making a determination that special education is needed. Full Article
high Relationships, Rigor, and Relevance - The Three Rs of Engaging Students in Urban High Schools By Published On :: Tue, 02 Dec 2003 06:00:00 GMT High schools that successfully engage students in learning have many things in common. Full Article
high EPA Standard for Fluoride in Drinking Water Is Not Protective - Tooth Enamel Loss, Bone Fractures of Concern at High Levels By Published On :: Wed, 22 Mar 2006 06:00:00 GMT The U.S. Environmental Protection Agencys standard for the maximum amount of fluoride allowed in drinking water -- 4 milligrams of fluoride per liter of water -- does not protect against adverse health effects. Full Article
high High Confidence That Planet Is Warmest in 400 Years - Less Confidence in Temperature Reconstructions Prior to 1600 By Published On :: Thu, 22 Jun 2006 05:00:00 GMT There is sufficient evidence from tree rings, boreholes, retreating glaciers, and other proxies of past surface temperatures to say with a high level of confidence that the last few decades of the 20th century were warmer than any comparable period in the last 400 years, according to a new report from the National Research Council. Full Article
high Hydraulic Fracturing Poses Low Risk for Causing Earthquakes, But Risks Higher for Wastewater Injection Wells By Published On :: Fri, 15 Jun 2012 05:00:00 GMT Hydraulic fracturing has a low risk for inducing earthquakes that can be felt by people, but underground injection of wastewater produced by hydraulic fracturing and other energy technologies has a higher risk of causing such earthquakes, says a new report from the National Research Council. Full Article
high Americans Have Worse Health Than People in Other High-Income Countries - Health Disadvantage Is Pervasive Across Age and Socio-Economic Groups By Published On :: Wed, 09 Jan 2013 06:00:00 GMT On average, Americans die sooner and experience higher rates of disease and injury than people in other high-income countries, says a new report from the National Research Council and Institute of Medicine. Full Article
high Analysis Used by Federal Agencies to Set Fuel Economy and Greenhouse Gas Standards for U.S. Cars Was Generally of High Quality - Some Technologies and Issues Should Be Re-examined By Published On :: Thu, 18 Jun 2015 05:00:00 GMT The analysis used by federal agencies to set standards for fuel economy and greenhouse gas emissions for new U.S. light-duty vehicles -- passenger cars and light trucks -- from 2017 to 2025 was thorough and of high caliber overall, says a new report from the National Research Council. Full Article
high Report Affirms the Goal of Elimination of Civilian Use of Highly Enriched Uranium and Calls for Step-wise Conversion of Research Reactors Still Using Weapon-grade Uranium Fuel - 50-year Federal Roadmap for Neutron-based Research Recommended By Published On :: Thu, 28 Jan 2016 06:00:00 GMT Efforts to convert civilian research reactors from weapon-grade highly enriched uranium (HEU) to low enriched uranium (LEU) fuels are taking significantly longer than anticipated, says a congressionally mandated report from the National Academies of Sciences, Engineering, and Medicine. Full Article
high Global Commissions That Reflected on Ebola Outbreak Highlight Overlapping Conclusions in New PLOS Medicine Piece By Published On :: Thu, 19 May 2016 05:00:00 GMT To make the world safer against future infectious disease threats, national health systems should be strengthened, the World Health Organization’s emergency and outbreak response activities should be consolidated and bolstered, and research and development should be enhanced, says a new Policy Forum article that appears in the May 19 edition of PLOS Medicine. Full Article
high Higher Education Under Assault - Spotlight on IIE’s Scholar Rescue Fund By Published On :: Fri, 20 May 2016 04:00:00 GMT At the May 2016 meeting of the CHR, James King, IIE-SRF Assistant Director, spoke to CHR members about IIE-SRF’s work, including its vital support of Syrian scholars during the 21st century’s worst humanitarian crisis. Full Article
high New NAM Special Publication Offers Opportunities for Improving Outcomes and Reducing Health Care Costs in ‘High-Needs Patients’ By Published On :: Thu, 06 Jul 2017 05:00:00 GMT Nearly half of the nation’s spending on health care is driven by 5 percent of patients, and improving health outcomes and curbing spending in health care will require identifying who these high-needs patients are and providing coordinated services through successful care models that link medical, behavioral, and community resources, says a new National Academy of Medicine special publication. Full Article
high U.S. Has Lost Its Dominance in Highly Intense, Ultrafast Laser Technology to Europe and Asia By Published On :: Wed, 06 Dec 2017 06:00:00 GMT The U.S. is losing ground in a second laser revolution of highly intense, ultrafast lasers that have broad applications in manufacturing, medicine, and national security, says a new report from the National Academies of Sciences, Engineering, and Medicine. Full Article
high Report Urges Development and Evaluation of Approaches that Integrate STEMM Fields with Arts and Humanities in Higher Education By Published On :: Mon, 07 May 2018 05:00:00 GMT An emerging body of evidence suggests that integrating STEMM fields (science, technology, engineering, mathematics, and medicine) with the humanities and arts in higher education is associated with positive learning outcomes that may help students enter the workforce, live enriched lives, and become active and informed citizens, says a new report from the National Academies of Sciences, Engineering, and Medicine Full Article
high Public Transit Agencies Should Not Have to Disclose Safety Planning Records in Court, Similar to Laws for State Highway Agencies and Passenger Railroads, Says New Report By Published On :: Wed, 30 May 2018 05:00:00 GMT To enable public transit agencies to engage in more rigorous and effective safety planning, their safety planning records should not be admissible as evidence in civil litigation, says a new report from the National Academies of Sciences, Engineering, and Medicine. Full Article
high U.S. Interstate Highways Need Overhaul By Published On :: Thu, 06 Dec 2018 06:00:00 GMT The future of the U.S. Interstate Highway System is threatened by a persistent and growing backlog of structural and operational deficiencies and by various looming challenges, such as the progress of automated vehicles, developments in electric vehicles, and vulnerabilities due to climate change. Full Article
high NAS, NAE, and NAM Presidents Highlight Facts on Vaccine Safety in Light of Measles Outbreaks By Published On :: Fri, 08 Mar 2019 06:00:00 GMT The current measles outbreaks in the United States and elsewhere are being fueled by misinformation about the safety of vaccines. Full Article